Characteristic features of the modulated structure appearing in the multiferroic material Bi1-xSmxFeO3 around x = 0.15

Masashi Nomoto, Takumi Inoshita, Yasuhide Inoue, Yoichi Horibe, Yasumasa Koyama

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

In Bi1-xSmxFeO3 (BSFO) having the multiferroic BiFeO3 as an end material, when the Sm content increases from x = 0, it has been reported that the ferroelectric-R3c state is changed into the paraelectric-Pnma state around x = 0.14. The R3c/Pnma state boundary around x = 0.14 can be regarded as a temperature-independent morphotropic-phase boundary (MPB). The notable feature in BSFO is that, in addition to these two states, the antiferroelectric PbZrO3-type state was also found in the vicinity of the MPB. Although the PbZrO3-type state appears as a modulated structure, its detailed features have not been understood yet. We have thus examined the crystallographic features of prepared BSFO samples around x = 0.14, mainly by transmission electron microscopy. The PbZrO3-type state was confirmed to be present in samples with x = 0.15 on the basis of x-ray powder diffraction profiles measured from prepared samples at 300 K. On the other hand, the observation made by transmission electron microscopy indicated that the state for x = 0.15 is characterized by a coexistence state consisting of the ferroelectric-R3c and antiferroelectric PbZrO3-type states. In particular, the crystal structure of the PbZrO3-type state could be identified as a modulated structure with two transverse modulation waves, whose wave vectors are given by qi = [1/2 0 0]o and q2 = [0 1/2 0]o in the orthorhombic-Pnma notation. In addition, eigenvectors of these two transverse waves were also determined to be parallel to the same [001]o direction.

本文言語English
ホスト出版物のタイトルTHERMEC 2016
編集者Christof Sommitsch, Mihail Ionescu, Brajendra Mishra, Brajendra Mishra, Ernst Kozeschnik, T. Chandra
出版社Trans Tech Publications Ltd
ページ1393-1398
ページ数6
ISBN(印刷版)9783035711295
DOI
出版ステータスPublished - 2017
イベント9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016 - Graz, Austria
継続期間: 2016 5 292016 6 3

出版物シリーズ

名前Materials Science Forum
879
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

Other

Other9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016
国/地域Austria
CityGraz
Period16/5/2916/6/3

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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「Characteristic features of the modulated structure appearing in the multiferroic material Bi<sub>1-x</sub>Sm<sub>x</sub>FeO<sub>3</sub> around x = 0.15」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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